The Contribution of the Type of Detergent to Domestic Laundry Graywater Composition and Its Effect on Treatment Performance
AbstractIn this study, the contribution of liquid and powder detergents to the composition of domestic laundry graywater was evaluated. Dosages recommended by the manufacturers were used to prepare detergent solutions and generate laundry graywater. Solutions and graywater were characterized in terms of total solids (TS), total suspended solids (TSS), total dissolved solids (TDS), chemical oxygen demand (COD), total organic carbon (TOC), and concentration of Linear Alkylbenzene Sulfonates (LAS’s). Additionally, the effect of the type of detergent on the treatment performance was also assessed. The coagulation–flocculation process was selected as a potential alternative for treating domestic laundry graywater. Treatment performance was assessed based on the removals of TS, TSS, TDS, turbidity, COD, and electrical conductivity (EC). Optimum coagulant dosages and mixing conditions for flocculation were determined. The results indicate a differential contribution of the type of detergent to the domestic laundry graywater composition. Liquid detergents contributed with more COD and TOC and fewer solids and LAS’s, in comparison with powder detergents. Soiled clothes increased the solids and organic loads of laundry graywater; furthermore, the laundry process reduced the LAS concentration of graywater by 77% for the liquid detergent and 47% for the powder detergent. On the other hand, the coagulation–flocculation process was more effective in treating powder detergent graywater even though the liquid detergent graywater was less polluted. Removal efficiencies on the order of 95% for turbidity and 75% for TSS were achieved for powder detergent graywater; meanwhile, for liquid detergent graywater, the removals were 73% for turbidity and 51% for TSS. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
López Zavala, M.Á.; Espinoza Estrada, E. The Contribution of the Type of Detergent to Domestic Laundry Graywater Composition and Its Effect on Treatment Performance. Water 2016, 8, 214.
López Zavala MÁ, Espinoza Estrada E. The Contribution of the Type of Detergent to Domestic Laundry Graywater Composition and Its Effect on Treatment Performance. Water. 2016; 8(5):214.Chicago/Turabian Style
López Zavala, Miguel Á.; Espinoza Estrada, Eunice. 2016. "The Contribution of the Type of Detergent to Domestic Laundry Graywater Composition and Its Effect on Treatment Performance." Water 8, no. 5: 214.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.